Which of these is most responsible for differences between the twentieth century to the twenty-first century?

I’d say platform as a service (paas) or application platform as a service (apaas) or platform base service is a category of cloud computing services that provides a platform allowing customers to develop, run, and manage applications without the complexity of building and maintaining the infrastructure typically associated with developing and launching an app.

It’s definitely true

Each mile is 1.60934 kilometer,so 10 miles are 1.60934x10=16.0934 kilometers;